#include <stdio.h>



int main() {

    int year, b;

    while (scanf("%d %d", &year, &b) != EOF) { 

        if(((year%100!=0&&year%4==0)||year%400==0))

        {

            if(b==2)

            printf("29\n");
            else
			{
				goto cc;
			} 

        }

        else {cc:

            switch(b)

            {

                case 2:

                printf("28\n");

                break;

                case 1:

                case 3:

                case 5:

                case 7:

                case 8:

                case 10:

                case 12:

                printf("31\n");

                break;

                default:

                printf("30\n");







            }

        }

    }

    return 0;

}